Abstract: A feeding bottle (10) comprises a container (12) having a threaded neck (22) around an opening of the container, a teat (16), and, a threaded annular collar. The teat has a flange (84), adapted to seat on said neck, a nipple (88), remote from the flange, and a one-way valve (110) formed in a depression (112) in the teat to allow the passage of air into the container but prevent leakage of liquid from the container through the valve. The collar is adapted to receive the teat through the aperture (56) of the collar. The depression (112) is provided with an upstanding flange (114) above the surface of the teat where the depression (112) joins a main surface of the teat, which flange (114) serves to protect the depression (112) against deformation of the main surface of the teat.